Specifying SMS parameters through SETSMS and SET SMS

After you activate an SMS configuration, you can use the SET SMS or SETSMS operator commands to specify SMS parameters, as follows:
  • Use the SET SMS command to start SMS if it is not started at IPL or to change SMS parameters if SMS is already running. The SMS parameters are taken from the IGDSMSxx member in SYS1.PARMLIB.
  • Use the SETSMS command when SMS is already running to change a single SMS parameter. You enter the parameter to be changed on the command line.
Note: Some parameters in the IGDSMSxx parmlib member are read at IPL time, but do not have any effect unless it is the first time the parameters are specified for a new configuration. As indicated in the section on changing IGDSMSxx parameters to support the coupling facility in z/OS DFSMSdfp Storage Administration, you must issue the SETSMS command for any changes to take effect. In particular, the values used by VSAM RLS for the following keywords are remembered from last initialization, but not overridden by the IGDSMSxx specifications at IPL time unless the SETSMS command is issued.
  • CF_TIME
  • DEADLOCK_DETECTION
  • RLS_MAXCFFEATURELEVEL
  • RLS_MAX_POOL_SIZE
  • RLSABOVETHEBARMAXPOOLSIZE
  • RLSFIXEDPOOLSIZE
  • SMF_TIME

For more information about using SETSMS and SET SMS, see z/OS MVS System Commands.

Parent topic: IGDSMSxx (storage management subsystem definition)